I have worked in Africa for a number of years and have found the Nigerian pilots that I worked with no different from any other human being. You treat them well they respond in kind, if you have anything to offer, advice or technique they soak it up like a sponge. Too many expat pilots viewed the African co-pilot as ballast in the left seat, the end result being a pilot lacking in skills and confidence. Who's fault is that? not the co-pilots.
Mayotte's comment about the Ops Manager is Scotia is so true, I really nice guy and a gentleman. I have known him since he was a young co-pilot. He's black, I'm white, but we both bleed red so inside we are all the same. It's what is inside some people's head that the problem.
I have also heard the ACN is applying to the Nigerian CAA for clearance to hire expat co-pilots! as part of the cost cutting exercise.